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* [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
@ 2020-03-25 12:50 marxin at gcc dot gnu.org
2020-03-25 12:50 ` [Bug debug/94323] " marxin at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-03-25 12:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94323
Bug ID: 94323
Summary: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’
failure since
r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jakub at gcc dot gnu.org, jason at gcc dot gnu.org
Target Milestone: ---
Since the revision I see:
$ cat x.cpp
volatile int a;
void fn1() {
({ a; });
}
$ g++ x.cpp -O2 -fcompare-debug -c
g++: error: x.cpp: ‘-fcompare-debug’ failure
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug debug/94323] [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
2020-03-25 12:50 [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d marxin at gcc dot gnu.org
@ 2020-03-25 12:50 ` marxin at gcc dot gnu.org
2020-03-25 16:03 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-03-25 12:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94323
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |10.0
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Known to work| |9.3.0
Target Milestone|--- |10.0
Last reconfirmed| |2020-03-25
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug debug/94323] [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
2020-03-25 12:50 [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d marxin at gcc dot gnu.org
2020-03-25 12:50 ` [Bug debug/94323] " marxin at gcc dot gnu.org
@ 2020-03-25 16:03 ` jakub at gcc dot gnu.org
2020-03-25 16:25 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-03-25 16:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94323
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The cause is again DEBUG_BEGIN_STMTs. cp_parser_statement_expr's
4941 return cp_expr (expr, combined_loc);
now calls protected_set_expr_location on expr, which for -g0 is a
CLEANUP_POINT_EXPR, but with -g is STATEMENT_LIST which contains a
DEBUG_BEGIN_STMT and that CLEANUP_POINT_EXPR.
protected_set_expr_location will do:
5147 if (CAN_HAVE_LOCATION_P (t))
5148 SET_EXPR_LOCATION (t, loc);
so overrides EXPR_LOCATION on the CLEANUP_POINT_EXPR, but in the -g case
doesn't.
Do we want protected_set_expr_location to handle STATEMENT_LISTs that only
contain a single non-DEBUG_* stmt by recursing into that?
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug debug/94323] [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
2020-03-25 12:50 [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d marxin at gcc dot gnu.org
2020-03-25 12:50 ` [Bug debug/94323] " marxin at gcc dot gnu.org
2020-03-25 16:03 ` jakub at gcc dot gnu.org
@ 2020-03-25 16:25 ` jakub at gcc dot gnu.org
2020-03-26 9:36 ` cvs-commit at gcc dot gnu.org
2020-03-26 9:44 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-03-25 16:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94323
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Status|NEW |ASSIGNED
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 48121
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48121&action=edit
gcc10-pr94323.patch
Untested fix. Though, it is very ugly.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug debug/94323] [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
2020-03-25 12:50 [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d marxin at gcc dot gnu.org
` (2 preceding siblings ...)
2020-03-25 16:25 ` jakub at gcc dot gnu.org
@ 2020-03-26 9:36 ` cvs-commit at gcc dot gnu.org
2020-03-26 9:44 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-03-26 9:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94323
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:da920d0c46c38fe25ee0b597a8698d3a4d098f3c
commit r10-7397-gda920d0c46c38fe25ee0b597a8698d3a4d098f3c
Author: Jakub Jelinek <jakub@redhat.com>
Date: Thu Mar 26 10:35:52 2020 +0100
tree: Fix -fcompare-debug issues due to protected_set_expr_location
[PR94323]
The following testcase FAILs since recently when the C++ FE started calling
protected_set_expr_location more often.
With -g, it is called on a STATEMENT_LIST that contains a DEBUG_BEGIN_STMT
and CLEANUP_POINT_EXPR, and as STATEMENT_LISTs have !CAN_HAVE_LOCATION_P,
nothing is set. Without -g, it is called instead on the CLEANUP_POINT_EXPR
directly and changes its location.
The following patch recurses on the single non-DEBUG_BEGIN_STMT statement
of a STATEMENT_LIST if any to make the two behave the same.
2020-03-26 Jakub Jelinek <jakub@redhat.com>
PR debug/94323
* tree.c (protected_set_expr_location): Recurse on STATEMENT_LIST
that contains exactly one non-DEBUG_BEGIN_STMT statement.
* g++.dg/debug/pr94323.C: New test.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug debug/94323] [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d
2020-03-25 12:50 [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d marxin at gcc dot gnu.org
` (3 preceding siblings ...)
2020-03-26 9:36 ` cvs-commit at gcc dot gnu.org
@ 2020-03-26 9:44 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-03-26 9:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94323
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2020-03-25 12:50 [Bug debug/94323] New: [10 Regression] g++: error: x.cpp: ‘-fcompare-debug’ failure since r10-7359-g6e771c087b10d5b730240ea35478eab8694c9c5d marxin at gcc dot gnu.org
2020-03-25 12:50 ` [Bug debug/94323] " marxin at gcc dot gnu.org
2020-03-25 16:03 ` jakub at gcc dot gnu.org
2020-03-25 16:25 ` jakub at gcc dot gnu.org
2020-03-26 9:36 ` cvs-commit at gcc dot gnu.org
2020-03-26 9:44 ` jakub at gcc dot gnu.org
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